// g++ -std=c++11 temp.cpp
#include <bits/stdc++.h>
using namespace std;

#define FOR(i,a,b) for(int i=(int)(a);i<(int)(b);i++)
#define REP(i,n) FOR(i,0,n)
#define EACH(itr,v) for(auto itr:v)
#define pb(s) push_back(s)
#define mp(a,b) make_pair(a,b)
#define all(x) (x).begin(),(x).end()
#define dbg(x) cout<<#x"="<<x<<endl

typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> P;
typedef pair<P, int> PPI;

#define INF INT_MAX/3

#define MAX_N 1000

int n;
int board[30][30];
int dx[] = {1,0,-1,0};
int dy[] = {0,1,0,-1};

int main(){
	cin>>n;
	REP(i,30)REP(j,30) board[i][j] = 0;
	int v = 1;
	int d = 0;
	for(int x = 0,y = 0;  v <= n*n ; x+=dx[d],y+=dy[d]){
		if(x < 0 || x >= n || y < 0 || y >= n || board[x][y] != 0){
			x -= dx[d]; y -= dy[d]; d++;
			if(d==4) d = 0;
			//dbg(x);dbg(y);dbg(v);dbg(d);
			continue;
		}
		//dbg(x);dbg(y);dbg(v);dbg(d);
		board[x][y] = v;
		v++;
	}
	REP(y,n){
		REP(x,n){
			printf("%03d ",board[x][y]);
		}
		cout<<endl;
	}
	return 0;
}